For Accounting Services
Prepare your clients for e-invoices on time
Starting 1. 1. 2028 companies in Slovenia will only exchange invoices as e-invoices. Your clients will come asking you. We help you in three steps: with a free client analysis, a referral program, and the e-Invoice Academy.
Start with the analysis: free of charge, your clients' tax numbers are all you need.
All companies in Slovenia
Companies, sole proprietors, associations, institutions, and natural persons with business activities.
Up to €3,000
€1,000–€3,000 for legal entities, €500–€1,500 for sole proprietors.
100+ connected programs
Accounting and business programs that exchange e-invoices through bizBox.
For your firm
Three steps to ready clients
The analysis shows you which clients you need to approach. With the referral program, leave the rollout to clients to us. In the Academy, you get answers before clients even ask you.
- Free · 5 business days
Customer analysis
Which clients are already prepared?
Send us your clients' tax numbers. You'll get an overview by group and draft notices, which you send under your own name.
Submit client list - Introductory meeting
Referral Program
Want to direct your clients to us?
You remain your clients' first point of contact and advisor, while we take care of the rollout and technical questions.
Schedule a meeting - Starts Dec 1. 12. 2026
e-Invoice Academy
Want to stay up to date?
News about the law, program readiness, real-world examples, and webinars. Free of charge and without obligation.
Sign up for the Academy
For your clients
Three paths to e-invoices
Every client starts where they issue invoices today.
- Connected software
Sends from their own program
The program is connected to bizBox, e-invoices go directly from it.
- XML Export
Upload prepared files
The program is not connected, but can export XML in the appropriate format.
- Web application
Starts in the bizBox application
For smaller clients without a suitable program, including those using Word or Excel.
For your clients
Your client, set up in just a few minutes
The guided questionnaire "How to get started with e-invoices" shows your client, in just a few minutes, which path to e-invoices is right for them. You can simply send the link to your clients.
20 free e-invoice sends per year in the bizBox app and in selected accounting programs.
How to get started with e-invoicesProfessionals trust us
Official partner of the Chamber of Accounting Services
"At the Chamber of Accounting Firms, we support digital solutions that simplify the work of accountants, comply with legislation, and contribute to greater efficiency. For several years now, we have been partnering with bizBox to raise awareness among members about the importance of e-invoices. Together, we conduct various training sessions and activities, such as Myths and Facts about E-Invoices, consultations, surveys, and presentations of best practices for implementing e-invoices in accounting firms. We are pleased that many of our members have joined the bizBox ecosystem and successfully introduced the use of e-invoices into their operations."
"As an accounting firm, we know how time-consuming document coordination and manual invoice sending can be. Our clients are impatient, and we are overburdened. With bizBox, we have achieved faster data flow and more satisfied clients."
"bizBox has become an indispensable part of our operations – both internally and when working with clients. It enables fast, secure, and efficient document exchange and significantly improves traceability and time savings. We recommend it to everyone who wants to easily digitalize their processes."
Why bizBox
One partner for all your clients
From a part-time sole proprietor with invoices in Word to a company with its own ERP. Connection to your program, the largest e-exchange network, and implementation support.
100+ partner integrations · 36 years in the market (ZZI d.o.o.)
* Selection of companies from Finance magazine rankings, bizBox e-invoice reception analysis.
Frequently Asked Questions
Accounting and bizBox
Questions we most frequently hear from accounting services.
Where should I start?
It's best to start with the free client analysis. Once you know which clients are already ready, it's easier to decide who to approach and whether you want to direct clients to us.
Do I need to submit all three forms?
No. Each form has its own purpose: with the analysis, you send us your client list; with the referral program, we schedule an introductory meeting; and you sign up for the Academy to receive news and webinars.
Is bizBox an accounting program?
No. bizBox is a platform for secure and legally compliant exchange of e-invoices and other e-documents. Your accounting program remains, bizBox ensures that e-invoices arrive in it.
Where will clients receive e-invoices?
Upon registration with bizBox, they receive an e-Inbox where e-invoices from all suppliers arrive. Reception is free. They review invoices in the web application or in a connected accounting or ERP program.
How does the service access client e-invoices?
The client grants you access to their company in bizBox, including an accountant role. If your program is connected to bizBox, you import invoices directly.
What about clients who write invoices in Word or Excel?
They register with bizBox and prepare and send e-invoices in the web application. They have 20 free e-invoice sends per year.
Do we need to provide technical support to clients?
No. You guide the clients, and the bizBox team handles technical questions and usage.
Does the service or the client place the order?
Both are possible. An accounting service can place an order for bizBox on behalf of the client, or the client can do it themselves.
Questions
Not sure where to start?
Get in touch, and together we'll figure out which step makes the most sense for your accounting firm to take first.
The bizBox team
Sales
ZZI d.o.o. · bizBox · Status: November 2026